I haven't watched Nightline since the Ted Koppel days, but this segment is a decent look into the business of hair care. Reporter Sharyn Alfonsi visits the research and development facilities of personal-care giant Procter & Gamble, showing viewers the tests that have gone into the reformulation of Pantene. Although the segment often feels more promotional than investigative, it's nonetheless a rarely seen peek into the scientific side of beauty — including a look at P&G's amazingly powerful microscopes. Worth a look.
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